Hi,
I have played on PS4 for a few years now and recently made the jump to the Stadia version. But whenever I change zones or log in, I get an error at the top right of my screen that says "Account Not Found." My characters load just fine, and at the character select screen it says Stadia Account: and has my account name correctly. My account also shows correctly linked on the website.
This error doesn't seem to be hurting anything, but obviously would like to make sure nothing bad happens in the future. I checked the known Stadia issues and don't see this problem there.